Hi guys!Do we have any information about the launch mass of the planned and in design SLS Block 1B.For SLS Block 1 it is just over 2600 metric tonnes.Also, do we know the thrust of the BOLE SRBs?/Kasper
The SLS Block 1B, and its SRBs, will have the same weight as those used on the SLS Block 1 (5.75 million pounds for launch vehicle, 1.6 million pounds for SRBs). The SLS Block 2 will not only be heavier but use more advanced SRBs.
Quote from: Vahe231991 on 12/08/2022 05:10 pmThe SLS Block 1B, and its SRBs, will have the same weight as those used on the SLS Block 1 (5.75 million pounds for launch vehicle, 1.6 million pounds for SRBs). The SLS Block 2 will not only be heavier but use more advanced SRBs.EUS is quite a bit heavier than ICPS, though. The vehicle will be more massive.
Thank you Ed 👍🏻😊But since the GLOW of the SLS Block 1 is well known, why would the Block 1B be under ITAR?/Kasper
I don't believe that the exact GLOW of Block 1 is well known......NASA has released vague round numbers only, unlike the Apollo days when such things were detailed to the pound - even to the point that propellant burn before release was accounted. - Ed Kyle
Quote from: edkyle99 on 12/13/2022 02:27 pmI don't believe that the exact GLOW of Block 1 is well known......NASA has released vague round numbers only, unlike the Apollo days when such things were detailed to the pound - even to the point that propellant burn before release was accounted. - Ed KyleAre you talking pound of weight/mass, or pound of thrust?I maybe mistaken, but isn't it true that you can be a lot more accurate about thrust with a liquid engine than a solid, simply because you actively regulate (via sensors, algorithms, software) the pump flow rate of prop, whereas with solids, there is no guarantee that the mixed solid prop will burn as precisely the same every single time, i.e. there can be slight deviation in the way the prop burns? I know they will be close, but with liquids, the burn is actively controlled, whereas even though from one solid to the next they will have the same mixture, mass, and internal cross-section, they are not controlled. How much deviation is possible from one to another? Surely more than single pounds? Thus you can be more accurate re. an F-1 a half century ago than you can an SRB today?